US20100179257A1 - Stabilization of Polycarbonates - Google Patents

Stabilization of Polycarbonates Download PDF

Info

Publication number
US20100179257A1
US20100179257A1 US12/601,727 US60172708A US2010179257A1 US 20100179257 A1 US20100179257 A1 US 20100179257A1 US 60172708 A US60172708 A US 60172708A US 2010179257 A1 US2010179257 A1 US 2010179257A1
Authority
US
United States
Prior art keywords
component
weight
composition
compound
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US12/601,727
Other versions
US8748518B2 (en
Inventor
Karen Raasch-Malberg
Thomas Enge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clariant International Ltd
Avient Switzerland GmbH
Original Assignee
Clariant Masterbatches Deutschland GmbH
Clariant Finance BVI Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Clariant Masterbatches Deutschland GmbH, Clariant Finance BVI Ltd filed Critical Clariant Masterbatches Deutschland GmbH
Assigned to CLARIANT MASTERBATCHES (DEUTSCHLAND) GMBH, CLARIANT FINANCE (BVI) LIMITED reassignment CLARIANT MASTERBATCHES (DEUTSCHLAND) GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENGE, THOMAS, RAASCH-MALBERG, KAREN
Publication of US20100179257A1 publication Critical patent/US20100179257A1/en
Application granted granted Critical
Publication of US8748518B2 publication Critical patent/US8748518B2/en
Assigned to CLARIANT INTERNATIONAL LTD. reassignment CLARIANT INTERNATIONAL LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CLARIANT FINANCE (BVI) LIMITED
Assigned to AVIENT SWITZERLAND GMBH reassignment AVIENT SWITZERLAND GMBH NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: CLARIANT MASTERBATCHES (DEUTSCHLAND) GMBH, CLARIANT FINANCE (BVI) LIMITED
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
    • C08K5/3432—Six-membered rings
    • C08K5/3435—Piperidines
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3472—Five-membered rings
    • C08K5/3475—Five-membered rings condensed with carbocyclic rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
    • C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/02—Copolymers with acrylonitrile

Definitions

  • the invention relates to the use of a specific hindered amine (hindered amine light stabilizer, HALS) and a specific bismalonate UV absorber for the stabilization of polycarbonates and of polycarbonate blends, in particular of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends, with respect to UV radiation.
  • HALS hindered amine light stabilizer
  • PC/ABS polycarbonate/acrylonitrile-butadiene-styrene
  • Masterbatches for the purposes of the invention are compositions comprising a carrier polymer and the additive, where the concentrations present of the additive in the masterbatch are higher than in the final application, and the carrier polymer does not have to be the polymer of the final application.
  • Preferred concentrations of the additives in masterbatches are of from 0.5 to 90% by weight, in particular of from 1 to 80% by weight, even more preferably of from 6 to 80% by weight, the % by weight values being based on the total weight of the masterbatches.
  • compositions comprising a polymer and the additive, where the additive is already present in the compounded material in the desired concentration for the final application or article and equally the polymer is the desired polymer of the final application or article, and a physical shaping process is therefore all that is needed to convert the compounded material to the desired form for the final application or article.
  • PC/ABS blends and items or articles composed of PC/ABS blends are known to the person skilled in the art, being mixtures composed of PC and ABS.
  • blend and mixture are used synonymously hereinafter.
  • EP 924 248 B discloses compositions comprising a polycarbonate (PC) polymer, a non-basic hindered amine, comprising a piperazinyl unit, and a UV absorber.
  • PC polycarbonate
  • non-basic hindered amine comprising a piperazinyl unit
  • UV absorber a UV absorber
  • WO 97/39051 A discloses the use of compositions comprising at least two different HALS for the stabilization of polypropylene.
  • PC a possible polymer to be stabilized as a theoretical possibility in a long list
  • these compositions have only poor suitability for the stabilization of PC or PC/ABS blends, since performance characteristics, in particular mechanical properties, are impaired.
  • the additive masterbatches used for stabilization of the PC/ABS blends are to have high loading of the additives, i.e. a high concentration. Furthermore, the masterbatches have to exhibit good miscibility and compatibility with the PC/ABS blend.
  • the additives have to have good dispersion in the masterbatch, in the compounded material and in the PC/ABS blend, and the masterbatch and/or the compounded material should not have negative effects on the mechanical properties of the final article.
  • PC/ABS blends are preferably used for the production of items for the automobile industry.
  • masterbatches comprising a specific HALS additive and a specific UV absorber cause improved stabilization of PC/ABS blends, in particular with respect to yellowing.
  • composition Z comprising a component A, a component B and a component C, where
  • the composition Z comprises as a fourth component a component D, the component D being a UV stabilizer which is particularly suitable for the stabilization of PC and of PC blends, in particular for the stabilization of PC/ABS blends, component D therefore being a compound selected from the group consisting of the compounds of the formulae (II), (IV), (V), (VI), (VII), (VIII), (IX), (X) and (XI).
  • component D being a UV stabilizer which is particularly suitable for the stabilization of PC and of PC blends, in particular for the stabilization of PC/ABS blends, component D therefore being a compound selected from the group consisting of the compounds of the formulae (II), (IV), (V), (VI), (VII), (VIII), (IX), (X) and (XI).
  • Component D is preferably composed of one or more UV stabilizers, more preferably of one or two UV stabilizers, even more preferably of one UV stabilizer.
  • Component D is preferably a compound selected from the group of compounds of the formulae (II), (VIII) and (X), more preferably component D is a compound of formula (II).
  • the composition Z can be a masterbatch, a compounded PC material or a stabilized PC polymer or a stabilized PC blend.
  • a PC blend for the purpose of the invention is composed of PC and of one or more polymers other than polycarbonate (polycarbonate blend or PC blend).
  • the PC can also comprise a plurality of polycarbonates.
  • the composition Z is preferably free from effective amounts of further HALS with a chemical structure other than the structure of the compound of the formula (I).
  • effective amounts are amounts in which HALS is usually used for the stabilization of polymers.
  • the compositions Z more preferably comprise no more than 0.1% by weight, even more preferably no more than 0.05% by weight, in particular no more than 0.01% by weight, of HALS with a chemical structure other than the structure of the compound of the formula (I), the % by weight values being based in each case on the total weight of the composition Z; the compositions Z are very particularly preferably free from further HALS with a chemical structure other than the structure of the compound of the formula (I).
  • component C is preferably a polymer selected from the group consisting of ABS, SAN, PS, PC and PC/ABS polymer; more preferably of ABS, PC and SAN polymer; further more preferably ABS, PC and SAN, even more preferably of SAN and PC polymer, especially of SAN.
  • composition Z is a compounded PC material or a stabilized PC polymer or a stabilized PC blend
  • component C is preferably PC or a PC blend
  • Composition Z preferably comprises
  • composition Z preferably comprises
  • composition Z is a compounded PC material or a stabilized PC polymer or a stabilized PC blend
  • the composition Z preferably comprises
  • the ratio by weight of component A to component B in the composition Z is preferably from 1:10 to 10:1, preferably from 1:5 to 5:1, particularly preferably from 1:3 to 3:1, in particular from 1:1 to 3:1.
  • the ratio by weight of component A to the combined amounts of component B and D in the composition Z is preferably from 1:10 to 10:1, preferably from 1:5 to 5:1, particularly preferably from 1:3 to 3:1, in particular from 1:3 to 1:1.
  • the ratio by weight of component B to component D in the composition Z is preferably from 1:10 to 10:1, preferably from 1:5 to 5:1, particularly preferably from 1:3 to 3:1, in particular from 1.1:1 to 1:1.1.
  • the composition Z preferably comprises from 10 to 100% by weight, particularly preferably from 50 to 100% by weight, in particular from 75 to 100% by weight, specifically from 90 to 100% by weight, of the total amount of components A and B and C and optionally D, the % by weight values being based in each case on the total weight of the composition Z.
  • composition Z is a masterbatch and the composition Z comprises component D
  • the composition Z preferably comprises
  • composition Z comprises a compounded PC material or a stabilized PC polymer or a stabilized PC blend, and the composition Z comprises component D
  • the composition Z preferably comprises
  • composition Z preferably comprises, as further substances S, one or more of components F and/or E.
  • Component F is a plastics additive from the group of the secondary antioxidants, in particular of the group of the phosphites, and
  • component E is a plastics additive from the group of the primary antioxidants, in particular of the group of the sterically hindered phenols.
  • Component F is preferably a secondary antioxidant selected from the group consisting of Tetrakis(2,4-di-tert-butylphenyl)[1,1-biphenyl]-4,4′-diylbisphosphonite, Tris(2,4-di-tert-butylphenyl)phosphite, Bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite and Bis(2,4-dicumylphenyl)pentaerytritoldiphosphite.
  • Tetrakis(2,4-di-tert-butylphenyl)[1,1-biphenyl]-4,4′-diylbisphosphonite Tris(2,4-di-tert-butylphenyl)phosphite, Bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite and Bis(2,4-
  • Component E is preferably the primary antioxidant Tetrakis(methylene 3,5-di-tert-butyl-hydroxycinnamate)methane or Octadecyl 3,5-di-tert-butylhydroxyhydrocinnamate.
  • the invention further provides a process for the preparation of the composition Z, characterized in that components A, B and C and optionally D and, if appropriate, further substances, in particular the substances S, and specifically components F and E, are physically mixed.
  • the invention therefore also provides a process for the stabilization of PC or PC blends, characterized in that the PC or the PC blend is physically mixed with component A, B and optionally D and, if appropriate, further substances, in particular the substances S, and specifically components F and E.
  • mixing is via extrusion or kneading or injection moulding or compression moulding, particularly preferably extrusion or injection moulding.
  • the mixing is preferably carried out continuously or discontinuously.
  • the mixing assemblies conventional in the masterbatch industry and plastics industry are used, preferably extruders, presses, or injection-moulding machines or kneaders.
  • the mixing temperature is preferably from 100° C. to 380° C., particularly preferably from 120° C. to 350° C.
  • the mixing time is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 30 min.
  • the mixing time for continuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 15 min; the mixing time for discontinuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 30 min.
  • composition Z is a masterbatch
  • the mixing is preferably carried out continuously or discontinuously, particularly preferably continuously.
  • the mixing assemblies conventional in the masterbatch industry are used, preferably extruders or kneaders.
  • the mixing temperature is preferably from 100° C. to 380° C., particularly preferably from 120° C. to 350° C., in particular from 150° C. to 320° C.
  • the mixing time is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 15 min.
  • the mixing time for continuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 15 min; the mixing time for discontinuous mixing is preferably from 1 min to 1 h, particularly preferably from 2 to 15 min.
  • composition Z is a compounded PC material or a stabilized PC polymer or a stabilized PC blend
  • mixing preferably takes place via extrusion or injection moulding or compression moulding, preferably via injection moulding.
  • the mixing is preferably carried out continuously or discontinuously, particularly preferably continuously.
  • the mixing assemblies conventional in the plastics industry are used, preferably extruders, presses or injection moulding machines.
  • the mixing temperature is preferably from 160° C. to 380° C., particularly preferably from 180° C. to 320° C.
  • the mixing time is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 1 h, in particular from 15 sec to 30 min.
  • the mixing time for continuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 30 min, in particular from 15 sec to 10 min; the mixing time for discontinuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 1 h, in particular from 15 sec to 30 min.
  • a stabilized PC polymer or stabilized PC blend it is preferable to mix a masterbatch MB with the PC polymer to be stabilized or with the PC blend to be stabilized.
  • the invention further provides the use of the composition Z for the preparation of, or the use of the compositions Z as, stabilized PC polymer or stabilized PC blend.
  • composition Z is a masterbatch MB
  • the invention further provides the use of the composition Z for the preparation of stabilized PC polymers or stabilized
  • PC blends where the stabilized PC polymers or stabilized PC blends can take the form of intermediate products or else the form of final products.
  • the intermediate products can take the form of pellets, powder or chips.
  • compositions Z are used for the preparation of, or as, stabilized PC polymer or stabilized PC blend for the automotive industry.
  • component A as defined above, also in all its preferred embodiments, in combination with the component B as defined above, also in all its preferred embodiments, and optionally with the component D as defined above, also in all its preferred embodiments, for the stabilization of polymers, e.g. for the stabilization of polymers against the damaging influence of light or of heat, especially against the damaging influence of visible or UV light, the polymers having been selected from the group consisting
  • compositions Z feature high and lasting colourfastness.
  • the amounts of additives needed for stabilization are low, and lightfastness and weather resistance are high.
  • Masterbatches with high loading can be prepared.
  • the inventive compositions exhibit good miscibility and compatibility with PC polymers and PC blends, and the additives give good dispersion in the masterbatch, in the compounded PC material, in the PC polymer and in the PC blend, and mechanical properties are good.
  • Table B gives the parts used; the process parameters cited in Table A are used, and the corresponding compositions are obtained.
  • compositions obtained in comparative examples 1 and 2 and in examples 11 and 12 were mixed with further components and processed in an injection-moulding machine to give injection mouldings.
  • Table C gives the parts of components.
  • Tables 1 to 3 cite the values measured.
  • compositions are essentially colorless.
  • the compositions Z counteract yellowing.
  • composition 41 when compared with 52, comprises slightly more antioxidants (components F1 and F2) with the same UV absorber concentrations (components D2 and B), yellowing is substantially more severe in the HALS-free composition 41.
  • Comparison of composition 41 and 42 with 51 and 52 shows, that only using UV absorbers alone gives substantially more severe yellowing than with presence of component A. Even a doubling of the UV absorber concentration in composition 42 results in substantially more severe yellowing when comparison is made with composition 51.
  • the components are homogenized together in a twin-screw extruder at a temperature of 180 to 250° C. in 15 to 20 seconds, and Table E gives the parts used; and the corresponding compositions are obtained.
  • compositions obtained in comparative examples 3-6 and 13, and 16 and example 14 were mixed with further components and processed in an injection-moulding machine to give injection mouldings.
  • Table F gives the parts of components.
  • the exposure to Xenon light shows similar tendency after one week (approx 165 h) as after two weeks (approx. 300 h).
  • Table 5 cites the values measured.
  • Table 5 cites the values measured.
  • Table 5 cites the values measured.
  • Example 58 showed slight yellowing already before exposure, when using the combination of compounds of formula (I) and (III), due to the relatively high concentration of stabilizers and therefore the own, slightly yellow color of the stabilizers begins to show. The yellow color before exposure did not change during exposure, i.e. did not become more intense.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention relates to the use of a specific hindered amine (hindered amine light stabilizer, HALS) and a specific bismalonate UV absorber for the stabilization of polycarbonates and of polycarbonate blends, in particular of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends, with respect to UV radiation.

Description

  • The invention relates to the use of a specific hindered amine (hindered amine light stabilizer, HALS) and a specific bismalonate UV absorber for the stabilization of polycarbonates and of polycarbonate blends, in particular of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends, with respect to UV radiation.
  • It is usual in the plastics industry to use additives in the form of compounds or masterbatches. Masterbatches for the purposes of the invention are compositions comprising a carrier polymer and the additive, where the concentrations present of the additive in the masterbatch are higher than in the final application, and the carrier polymer does not have to be the polymer of the final application.
  • Preferred concentrations of the additives in masterbatches are of from 0.5 to 90% by weight, in particular of from 1 to 80% by weight, even more preferably of from 6 to 80% by weight, the % by weight values being based on the total weight of the masterbatches.
  • Compounds for the purposes of the invention are compositions comprising a polymer and the additive, where the additive is already present in the compounded material in the desired concentration for the final application or article and equally the polymer is the desired polymer of the final application or article, and a physical shaping process is therefore all that is needed to convert the compounded material to the desired form for the final application or article.
  • PC/ABS blends and items or articles composed of PC/ABS blends are known to the person skilled in the art, being mixtures composed of PC and ABS. The terms blend and mixture are used synonymously hereinafter.
  • EP 924 248 B discloses compositions comprising a polycarbonate (PC) polymer, a non-basic hindered amine, comprising a piperazinyl unit, and a UV absorber. In paragraphs [0004] and [0005] the known technical difficulties are described which prevent use of HALS additives for the stabilization of PC. In particular, the presence of basic HALS leads to hydrolysis of the PC polymer chains. The result, as described in [0005], is impairment of mechanical properties. For this reason, nowadays practically only UV absorbers are used as light stabilizers for polycarbonates (H. Zweifel, Plastic Additives Handbook, 5th edition, Hanser Publishers, Munich, 2000, pp. 369-372). PC/ABS blends which are therefore modified only with UV absorbers but without HALS, sometimes have insufficient UV resistance. Furthermore, high concentrations of UV absorbers are often needed for stabilization. These disadvantages are known to the person skilled in the art.
  • The use of UV absorbers alone for the stabilization of PC/ABS blends leads to rapid impairment of mechanical properties via UV radiation, since the butadiene fractions of the ABS are rapidly damaged via photooxidation in the absence of adequate UV protection via HALS, as described in EP 924 248 B [0005], and in C. Krebs and M.-A. Avondet, Langzeitverhalten von Thermoplasten, Hanser, Munich 1999, pp. 156-157. In particular, the result is considerable yellowing and, associated therewith, loss of mechanical properties. Examples in EP 924 248 B show that the stabilization of PC with conventional HALS leads to mechanical properties poorer than those of unstabilized PC (Tables 5, 7 and 10).
  • WO 97/39051 A discloses the use of compositions comprising at least two different HALS for the stabilization of polypropylene. Although the description also mentions PC as a possible polymer to be stabilized as a theoretical possibility in a long list, these compositions have only poor suitability for the stabilization of PC or PC/ABS blends, since performance characteristics, in particular mechanical properties, are impaired.
  • Stringent requirements are placed upon plastics parts composed of PC/ABS blends: they have to exhibit high and lasting colourfastness, minimum amounts of additives are to be used for stabilization, maximum lightfastness and maximum weather resistance are to be achieved.
  • The additive masterbatches used for stabilization of the PC/ABS blends are to have high loading of the additives, i.e. a high concentration. Furthermore, the masterbatches have to exhibit good miscibility and compatibility with the PC/ABS blend. The additives have to have good dispersion in the masterbatch, in the compounded material and in the PC/ABS blend, and the masterbatch and/or the compounded material should not have negative effects on the mechanical properties of the final article.
  • PC/ABS blends are preferably used for the production of items for the automobile industry.
  • The known additive systems do not meet all of the current requirements placed upon the stabilization of PC/ABS blends. There was a need for improved stabilization of PC/ABS blends.
  • Surprisingly, masterbatches comprising a specific HALS additive and a specific UV absorber cause improved stabilization of PC/ABS blends, in particular with respect to yellowing.
  • Subject of the invention is a composition Z comprising a component A, a component B and a component C, where
    • component A is a compound of the formula (I);
  • Figure US20100179257A1-20100715-C00001
    • component C is one or more polymers selected from the group consisting of polycarbonates (PC),
      • of blends composed of polycarbonate (PC) and of one or more polymers other than polycarbonate (polycarbonate blend or PC blend), this further polymer other than polycarbonate in the PC blend preferably being selected from the group consisting of styrene copolymers, preferred styrene copolymers being acrylonitrile-butadiene-styrene (ABS), acrylonitrile-styrene-acrylate (ASA), acrylonitrile-ethylene-propylene-diene rubber-styrene (acrylonitrile-EPDM-styrene), methyl methacrylate-butadiene-styrene or styrene-acrylonitrile (SAN); or from the group consisting of the polyesters, preferred polyesters being polyethylene terephthalate (PET) or polybutylene terephthalate (PBT); or from the group consisting of the rubbers, preferred rubbers being nitrile rubber, polybutadiene, polyisoprene or acrylate rubber, or from the group consisting of the polyvinyl polymers and of the vinyl chloride copolymers;
      • and of polymers compatible with polycarbonates, these polymers compatible with polycarbonates being selected from the group consisting of acrylonitrile-butadiene-styrene (ABS), styrene-acrylonitrile (SAN) and polystyrene (PS);
    • and component B being a compound of formula (III).
  • Figure US20100179257A1-20100715-C00002
  • Optionally, the composition Z comprises as a fourth component a component D, the component D being a UV stabilizer which is particularly suitable for the stabilization of PC and of PC blends, in particular for the stabilization of PC/ABS blends, component D therefore being a compound selected from the group consisting of the compounds of the formulae (II), (IV), (V), (VI), (VII), (VIII), (IX), (X) and (XI).
  • Figure US20100179257A1-20100715-C00003
    Figure US20100179257A1-20100715-C00004
  • Component D is preferably composed of one or more UV stabilizers, more preferably of one or two UV stabilizers, even more preferably of one UV stabilizer.
  • Component D is preferably a compound selected from the group of compounds of the formulae (II), (VIII) and (X), more preferably component D is a compound of formula (II).
  • The composition Z can be a masterbatch, a compounded PC material or a stabilized PC polymer or a stabilized PC blend. A PC blend for the purpose of the invention is composed of PC and of one or more polymers other than polycarbonate (polycarbonate blend or PC blend). The PC can also comprise a plurality of polycarbonates.
  • The composition Z is preferably free from effective amounts of further HALS with a chemical structure other than the structure of the compound of the formula (I). For the purposes of the invention, effective amounts are amounts in which HALS is usually used for the stabilization of polymers. The compositions Z more preferably comprise no more than 0.1% by weight, even more preferably no more than 0.05% by weight, in particular no more than 0.01% by weight, of HALS with a chemical structure other than the structure of the compound of the formula (I), the % by weight values being based in each case on the total weight of the composition Z; the compositions Z are very particularly preferably free from further HALS with a chemical structure other than the structure of the compound of the formula (I).
  • In the event that the composition Z is a masterbatch, component C is preferably a polymer selected from the group consisting of ABS, SAN, PS, PC and PC/ABS polymer; more preferably of ABS, PC and SAN polymer; further more preferably ABS, PC and SAN, even more preferably of SAN and PC polymer, especially of SAN.
  • In the event that the composition Z is a compounded PC material or a stabilized PC polymer or a stabilized PC blend, component C is preferably PC or a PC blend,
      • the further polymer other than polycarbonate in the PC blend preferably being selected from the group consisting of styrene copolymers, preferred styrene copolymers being acrylonitrile-butadiene-styrene (ABS), acrylonitrile-styrene-acrylate (ASA), acrylonitrile-EPDM-styrene, methyl methacrylate-butadiene-styrene or styrene-acrylonitrile (SAN); or from the group consisting of the polyesters, preferred polyesters being polyethylene terephthalate (PET) or polybutylene terephthalate (PBT); or from the group consisting of the rubbers, preferred rubbers being nitrile rubber, polybutadiene, polyisoprene or acrylate rubber, or from the group consisting of the polyvinyl polymers and of the vinyl chloride copolymers;
        component C particularly preferably being a PC or a PC/ABS polymer.
  • Composition Z preferably comprises
      • from 0.01 to 30% by weight of component A,
      • from 20 to 99.98% by weight of component C,
      • from 0.01 to 30% by weight of component B, and
      • from 0 to 79.98% by weight of further substances, preferably component D and/or substances S;
        more preferably
      • from 0.01 to 30% by weight of component A,
      • from 30 to 99.98% by weight of component C,
      • from 0.01 to 30% by weight of component B, and
      • from 0 to 69.98% by weight of further substances, preferably component D and/or substances S;
        even more preferably
      • from 0.05 to 15% by weight of component A,
      • from 32.5 to 99.9% by weight of component C,
      • from 0.05 to 15% by weight of component B, and
      • from 0 to 67.4% by weight of further substances, preferably component D and/or substances S;
        the % by weight values being based in each case on the total weight of the composition Z; where the % by weight values for components A, B and C and for the further substances, preferably component D and/or substances S, always give a total of 100% by weight.
  • In the event that the composition Z is a masterbatch, the composition Z preferably comprises
      • from 1 to 30% by weight of component A,
      • from 20 to 98% by weight of component C,
      • from 1 to 30% by weight of component B, and
      • from 0 to 78% by weight of further substances, preferably component D and/or substances S;
        more preferably
      • from 1 to 30% by weight of component A,
      • from 30 to 98% by weight of component C,
      • from 1 to 30% by weight of component B, and
      • from 0 to 68% by weight of further substances, preferably component D and/or substances S;
        even more preferably
      • from 2.5 to 15% by weight of component A,
      • from 30.5 to 95% by weight of component C,
      • from 2.5 to 15% by weight of component B, and
      • from 0 to 64.5% by weight of further substances, preferably component D and/or substances S;
        in particular
      • from 5 to 12% by weight of component A,
      • from 39 to 90% by weight of component C,
      • from 5 to 12% by weight of component B, and
      • from 0 to 51% by weight of further substances, preferably component D and/or substances S;
        the % by weight values being based in each case on the total weight of the composition Z; where the % by weight values for components A, B and C and for the further substances, preferably component D and/or substances S, always give a total of 100% by weight.
  • In the event that the composition Z is a compounded PC material or a stabilized PC polymer or a stabilized PC blend, the composition Z preferably comprises
      • from 0.01 to 5% by weight of component A,
      • from 80 to 99.98% by weight of component C,
      • from 0.01 to 5% by weight of component B, and
      • from 0 to 19.98% by weight of further substances, preferably component D and/or substances S;
        particularly preferably
      • from 0.02 to 2% by weight of component A,
      • from 86 to 99.9% by weight of component C,
      • from 0.02 to 2% by weight of component B, and
      • from 0 to 13.96% by weight of further substances, preferably component D and/or substances S;
        in particular
      • from 0.05 to 1% by weight of component A,
      • from 88 to 99% by weight of component C,
      • from 0.05 to 1% by weight of component B, and, optionally,
      • from 0 to 11.9% by weight of further substances, preferably component D and/or substances S;
        the % by weight values being based in each case on the total weight of the composition Z; where the % by weight values for components A, B and C and for the further substances, preferably component D and/or substances S; always give a total of 100% by weight.
  • The ratio by weight of component A to component B in the composition Z is preferably from 1:10 to 10:1, preferably from 1:5 to 5:1, particularly preferably from 1:3 to 3:1, in particular from 1:1 to 3:1.
  • In the event that the composition Z further comprises component D, the ratio by weight of component A to the combined amounts of component B and D in the composition Z is preferably from 1:10 to 10:1, preferably from 1:5 to 5:1, particularly preferably from 1:3 to 3:1, in particular from 1:3 to 1:1.
  • In the event that the composition Z further comprises component D, the ratio by weight of component B to component D in the composition Z is preferably from 1:10 to 10:1, preferably from 1:5 to 5:1, particularly preferably from 1:3 to 3:1, in particular from 1.1:1 to 1:1.1.
  • The composition Z preferably comprises from 10 to 100% by weight, particularly preferably from 50 to 100% by weight, in particular from 75 to 100% by weight, specifically from 90 to 100% by weight, of the total amount of components A and B and C and optionally D, the % by weight values being based in each case on the total weight of the composition Z.
  • In the event that the composition Z is a masterbatch and the composition Z comprises component D, the composition Z preferably comprises
      • from 1 to 30% by weight of component A,
      • from 1 to 30% by weight of component B,
      • from 1 to 30% by weight of component D,
      • from 10 to 97% by weight of component C, and
      • from 0 to 87% by weight of further substances, preferably substances S;
        particularly preferably
      • from 2.5 to 15% by weight of component A,
      • from 2.5 to 15% by weight of component B,
      • from 2.5 to 15% by weight of component D,
      • from 30.5 to 92.5% by weight of component C, and
      • from 0 to 62% by weight of further substances, preferably substances S;
        in particular
      • from 5 to 12% by weight of component A,
      • from 5 to 12% by weight of component B,
      • from 5 to 12% by weight of component D,
      • from 39 to 75% by weight of component C, and
      • from 0 to 46% by weight of further substances, preferably substances S;
        the % by weight values being based in each case on the total weight of the composition Z; where the % by weight values for components A, B, C and D and for the further substances, preferably substances S, always give a total of 100% by weight.
  • In the event that the composition Z comprises a compounded PC material or a stabilized PC polymer or a stabilized PC blend, and the composition Z comprises component D, the composition Z preferably comprises
      • from 0.01 to 5% by weight of component A,
      • from 0.01 to 5% by weight of component B,
      • from 0.01 to 5% by weight of component D,
      • from 75 to 99.97% by weight of component C, and
      • from 0 to 24.97% by weight of further substances, preferably substances S;
        more preferably
      • from 0.01 to 5% by weight of component A,
      • from 0.01 to 5% by weight of component B,
      • from 0.01 to 5% by weight of component D,
      • from 80 to 99.97% by weight of component C, and
      • from 0 to 19.97% by weight of further substances, preferably substances S;
        even more preferably
      • from 0.02 to 2% by weight of component A,
      • from 0.02 to 2% by weight of component B,
      • from 0.02 to 2% by weight of component D,
      • from 84 to 99.94% by weight of component C, and
      • from 0 to 15.94% by weight of further substances, preferably substances S;
        in particular
      • from 0.05 to 1% by weight of component A,
      • from 0.05 to 1% by weight of component B,
      • from 0.05 to 1% by weight of component D,
      • from 87 to 99.85% by weight of component C, and
      • from 0 to 12.85% by weight of further substances, preferably substances S;
        the % by weight values being based in each case on the total weight of the composition Z; where the % by weight values for components A, B, C and D and for the further substances, preferably substances S, always give a total of 100% by weight.
  • The composition Z preferably comprises, as further substances S, one or more of components F and/or E.
  • Component F is a plastics additive from the group of the secondary antioxidants, in particular of the group of the phosphites, and
  • component E is a plastics additive from the group of the primary antioxidants, in particular of the group of the sterically hindered phenols.
  • Component F is preferably a secondary antioxidant selected from the group consisting of Tetrakis(2,4-di-tert-butylphenyl)[1,1-biphenyl]-4,4′-diylbisphosphonite, Tris(2,4-di-tert-butylphenyl)phosphite, Bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite and Bis(2,4-dicumylphenyl)pentaerytritoldiphosphite.
  • Component E is preferably the primary antioxidant Tetrakis(methylene 3,5-di-tert-butyl-hydroxycinnamate)methane or Octadecyl 3,5-di-tert-butylhydroxyhydrocinnamate.
  • The invention further provides a process for the preparation of the composition Z, characterized in that components A, B and C and optionally D and, if appropriate, further substances, in particular the substances S, and specifically components F and E, are physically mixed.
  • The invention therefore also provides a process for the stabilization of PC or PC blends, characterized in that the PC or the PC blend is physically mixed with component A, B and optionally D and, if appropriate, further substances, in particular the substances S, and specifically components F and E.
  • It is preferable that mixing is via extrusion or kneading or injection moulding or compression moulding, particularly preferably extrusion or injection moulding.
  • The mixing is preferably carried out continuously or discontinuously.
  • The mixing assemblies conventional in the masterbatch industry and plastics industry are used, preferably extruders, presses, or injection-moulding machines or kneaders.
  • The mixing temperature is preferably from 100° C. to 380° C., particularly preferably from 120° C. to 350° C.
  • The mixing time is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 30 min.
  • The mixing time for continuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 15 min; the mixing time for discontinuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 30 min.
  • In the event that the composition Z is a masterbatch, it is preferable to mix via extrusion or kneading, particularly preferably via extrusion. The mixing is preferably carried out continuously or discontinuously, particularly preferably continuously. The mixing assemblies conventional in the masterbatch industry are used, preferably extruders or kneaders.
  • The mixing temperature is preferably from 100° C. to 380° C., particularly preferably from 120° C. to 350° C., in particular from 150° C. to 320° C.
  • The mixing time is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 15 min.
  • The mixing time for continuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 15 min; the mixing time for discontinuous mixing is preferably from 1 min to 1 h, particularly preferably from 2 to 15 min.
  • In the event that the composition Z is a compounded PC material or a stabilized PC polymer or a stabilized PC blend, mixing preferably takes place via extrusion or injection moulding or compression moulding, preferably via injection moulding. The mixing is preferably carried out continuously or discontinuously, particularly preferably continuously. The mixing assemblies conventional in the plastics industry are used, preferably extruders, presses or injection moulding machines.
  • The mixing temperature is preferably from 160° C. to 380° C., particularly preferably from 180° C. to 320° C.
  • The mixing time is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 1 h, in particular from 15 sec to 30 min.
  • The mixing time for continuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 30 min, in particular from 15 sec to 10 min; the mixing time for discontinuous mixing is preferably from 10 sec to 1 h, particularly preferably from 15 sec to 1 h, in particular from 15 sec to 30 min.
  • For preparation of a stabilized PC polymer or stabilized PC blend, it is preferable to mix a masterbatch MB with the PC polymer to be stabilized or with the PC blend to be stabilized.
  • The invention further provides the use of the composition Z for the preparation of, or the use of the compositions Z as, stabilized PC polymer or stabilized PC blend.
  • In the event that the composition Z is a masterbatch MB, the invention further provides the use of the composition Z for the preparation of stabilized PC polymers or stabilized
  • PC blends, where the stabilized PC polymers or stabilized PC blends can take the form of intermediate products or else the form of final products. The intermediate products can take the form of pellets, powder or chips.
  • In particular, the compositions Z are used for the preparation of, or as, stabilized PC polymer or stabilized PC blend for the automotive industry.
  • Further substances S, which can be present in the composition Z, are
    • colourants, preferred colourants being organic and inorganic dyes and pigments, preferred organic pigments being azo or disazo pigments, laked azo or disazo pigments or polycyclic pigments, particularly preferably phthalocyanine, diketopyrrolopyrrole, quinacridone, perylene, dioxazine, anthraquinone, thioindigo, diaryl or quinophthalone pigments; inorganic pigments preferably used for pigmentation being suitable metal oxides, mixed oxides, aluminium sulphates, chromates, metal powders, pearlescent pigments (mica), luminescent colours, titanium oxides, cadmium lead pigments, iron oxides, carbon black, silicates, nickel titanates, cobalt pigments or chromium oxides; the colourants here can also be used as masterbatches;
    • fillers, preferably silica, zeolites, silicates, particularly preferably aluminium silicates, sodium silicate, calcium silicates; and chalk or talc;
    • auxiliaries, preferably acid scavengers, lubricants, stearates, blowing agents, nucleating agents, peroxides, or oxides such as magnesium oxide;
    • antioxidants, preferably primary or secondary antioxidants;
    • antistatic agents, preferably glycerol stearates, glycerol monostearates, alkylamines, fatty acid mixtures, amines, ethoxylated amines, alkylsulphonates, glycerol esters or mixtures (blends) thereof;
    • UV absorbers, slip agents, antifogging agents, anticondensation agents and/or
    • suspension stabilizers, flame retardants;
      or a mixture composed of these substances.
  • Further subject of the invention is the joint use of the component A as defined above, also in all its preferred embodiments, in combination with the component B as defined above, also in all its preferred embodiments, and optionally with the component D as defined above, also in all its preferred embodiments, for the stabilization of polymers, e.g. for the stabilization of polymers against the damaging influence of light or of heat, especially against the damaging influence of visible or UV light, the polymers having been selected from the group consisting
    • of the polycarbonates (PC) and
    • of the blends composed of polycarbonate and of one or more polymers other than polycarbonate (polycarbonate blends or PC blends);
      it is preferable that the further polymer other than polycarbonate in the PC blend has been selected from the group consisting of styrene copolymers, preferred styrene copolymers being acrylonitrile-butadiene-styrene (ABS), acrylonitrile-styrene-acrylate (ASA), acrylonitrile-ethylene-propylene-diene rubber-styrene (acrylonitrile-EPDM-styrene), methyl methacrylate-butadiene-styrene or styrene-acrylonitrile (SAN); or from the group of the polyesters, preferred polyesters being polyethylene terephthalate (PET) or polybutylene terephthalate (PBT); or from the group of the rubbers, preferred rubbers being nitrile rubber, polybutadiene, polyisoprene or acrylate rubber, or from the group of the polyvinyl polymers and of the vinyl chloride copolymers.
  • Surprisingly, the compositions Z feature high and lasting colourfastness. The amounts of additives needed for stabilization are low, and lightfastness and weather resistance are high. Masterbatches with high loading can be prepared. The inventive compositions exhibit good miscibility and compatibility with PC polymers and PC blends, and the additives give good dispersion in the masterbatch, in the compounded PC material, in the PC polymer and in the PC blend, and mechanical properties are good.
  • It was also surprising that the specific HALS achieves markedly improved colourfastness, without any impairment of mechanical properties when comparison is made with HALS-free stabilization or stabilization by a HALS with a structure other than that of the formula (I).
    • Test Methods:
  • Product properties are determined by the following methods:
      • Determination of mechanical properties, such as tensile strength, tensile strength at break, tensile strain and tensile strain at break according to DIN EN ISO 527-1.
      • The intention is minimum change in mechanical properties and in particular no severe impairment thereof
      • Determination of Charpy impact properties, such as impact resistance and notched impact resistance according to DIN EN ISO 179-1.
      • The intention is minimum change in impact properties and in particular no severe impairment thereof
      • Determination of Vicat softening point according to DIN EN ISO 306 There should be minimum change in the Vicat point.
      • Determination of light-stability (I): Exposure to laboratory Xenon arc lamp, 1250 W/m2 (300-800 nm) in a Xenotest 150S instrument. Yellowing is determined by visual inspection. Minimum yellowing is to occur.
      • Determination of light stability (II) at increased temperature according to PV1303 (test method of Volkswagen, Germany): Testing of automotive-interior components on exposure to light with Xenon arc instrument according to DIN 75202; black standard temperature: 100° C.±3° C.; test chamber temperature: 65° C.±3° C.; relative humidity: 20±10%; irradiance: 60 W/m2 (300±400 nm); exposure 5 cycles. Qualitative evaluation of colour change using the grey scale to DIN EN 20105-102 and visual inspection. Minimum yellowing is to occur.
      • Testing of melt index, also termed melt volume rate or MFR, to ISO 1133: MFR should not change excessively.
    EXAMPLES Substances Used
    • Component A: compound of the formula (I), Hostavin® PR-31, Clariant International Ltd.
    • Component D2: a compound of the formula (II) Tinuvin® 234, Ciba Specialty Chemicals AG
    • Component B: a compound of the formula (III), Hostavin® B-CAP, Clariant International Ltd.
    • Component D5: a compound of the formula (V), Chimassorb® 81, Ciba Specialty Chemicals AG
    • Component D8: a compound of the formula (VIII), Tinuvin® P, Ciba Specialty Chemicals AG
    • Component C1: SAN polymer, a styrene-acrylonitrile whose Vicat softening point is at least 96° C. (B/50) and whose melt volume rate is from 22.0 to 36.0 cm3/10 min (220° C./5 kg)
    • Component C2: PC/ABS blend whose density is 1100 kg/m3 and whose melt volume rate is 12 cm3/10 min (260° C./5 kg)
    • Component C3: PC/ABS blend whose density is 1120 kg/m3 and whose melt volume rate is 17 cm3/10 min (260° C./5 kg)
    • Component C4: multi purpose, low viscosity grade polycarbonate PC
    • Component F1:
  • Figure US20100179257A1-20100715-C00005
    • Component F2:
  • Figure US20100179257A1-20100715-C00006
    • Component E1:
  • Figure US20100179257A1-20100715-C00007
    • Component H1: a compound of the formula (XII), Tinuvin® 770, Ciba Specialty Chemicals AG
  • Figure US20100179257A1-20100715-C00008
    • Component SI: Ankermag B 21 magnesium oxide MgO, Magnifin Magnesiaprodukte GmbH & Co. KG
    • Component SII: (grey) colour masterbatch
  • Parts hereinafter means parts by weight, “ex” means example, “comp ex” means comparative example, and values stated in the tables are parts, unless otherwise indicated.
    • Comparative Examples 1 and 2 and Examples 11 and 12
  • The components are homogenized together in a twin-screw extruder, Table B gives the parts used; the process parameters cited in Table A are used, and the corresponding compositions are obtained.
  • TABLE A
    Ex Composition Extruder Temperature Time
    comp ex 1 1 150 to 250° C. 15-20 s
    comp ex 2 2 180 to 215° C. 15-20 s
    11 11 180 to 215° C. 15-20 s
    12 12 180 to 215° C. 15-20 s
  • TABLE B
    Components
    Ex Composition A D2 B C1 F1 F2 E1 S1
    comp ex 1 1 — 5 7.5 80 2.5 2.5 2.5 —
    comp ex 2 2 — 10 15 70 2.5 — 2.5 —
    11 11 7.5 5 7.5 75 2.5 — 2.5 —
    12 12 7.5 5 7.5 71 1.25 1.25 2.5 4
    • Examples 21, 51 and 52 and Comparative Examples 20, 40, 41 and 42
  • The compositions obtained in comparative examples 1 and 2 and in examples 11 and 12 were mixed with further components and processed in an injection-moulding machine to give injection mouldings. Table C gives the parts of components.
  • TABLE C
    Components used
    Composition
    Ex Composition 1 2 11 12 C2 C3 SII
    comp ex 20 20 — — — — — 100 —
    21 21 — — 4 — —  92 4
    comp ex 40 40 — — — — 100  — —
    comp ex 41 41 4 — — — 92 — 4
    comp ex 42 42 — 4 — — 92 — 4
    51 51 — — 4 — 92 — 4
    52 52 — — — 4 92 — 4
  • Tables 1 to 3 cite the values measured.
  • TABLE 1
    Light stability II
    Ex Visual result Grey scale
    21 slightly yellowed 3 to 4
    comp ex 41 severely yellowed 1 to 2
    comp ex 42 severely yellowed 1 to 2
    51 slightly yellowed 2 to 3
    52 slightly yellowed 2
  • Before the light stability test, the compositions are essentially colorless. The compositions Z counteract yellowing. Although composition 41, when compared with 52, comprises slightly more antioxidants (components F1 and F2) with the same UV absorber concentrations (components D2 and B), yellowing is substantially more severe in the HALS-free composition 41. Comparison of composition 41 and 42 with 51 and 52 shows, that only using UV absorbers alone gives substantially more severe yellowing than with presence of component A. Even a doubling of the UV absorber concentration in composition 42 results in substantially more severe yellowing when comparison is made with composition 51.
  • TABLE 2
    Notched impact Impact-
    resistance resistance Vicat
    Ex [%] [mJ/mm2] [° C.]
    comp ex 20 100% 94.5 122.4
    21 95.0% of comp ex 20 95.0 116.8
    comp ex 40 100% 84.7 106.4
    comp ex 41 88.0% of comp ex 40 70.0 103.3
    comp ex 42 114.0% of comp ex 40  87.3 102.3
    51 102.0% of comp ex 40  86.6 103.4
    52 95.3% of comp ex 40 86.6 103.5
  • It is apparent that the impact properties have been little affected, and in particular have actually tended to improve slightly. Vicat point has decreased only slightly.
  • It is also apparent that there is little effect on tensile properties in the inventive compositions, indeed there is sometimes an improvement. In particular, comparison of 51 and 52 with the HALS-free formulation comp ex 42 shows no impairment of mechanical properties.
  • TABLE 3
    Tensile Tensile strength Tensile strain
    strength at break at break
    Ex [N/mm2] [N/mm2] [%]
    comp ex 20 51.0 45.1 60.0
    21 51.7 45.0 55.2
    comp ex 40 48.4 39.2 32.6
    comp ex 41 47.9 38.4 17.5
    comp ex 42 48.2 39.0 25.7
    51 47.7 39.2 33.6
    52 47.4 38.6 27.4
  • Further parameters for the inventive examples are shown in Table 4.
  • TABLE 4
    MFR Tensile strain
    Ex [g/10 min] at 260° C./5 kg [%]
    21 27.1 4.87
    51 26.8 4.41
    52 26.2 4.34
    • Comparative Examples 3, 4, 5, 6 and 13 and Example 14
  • The components are homogenized together in a twin-screw extruder at a temperature of 180 to 250° C. in 15 to 20 seconds, and Table E gives the parts used; and the corresponding compositions are obtained.
  • TABLE E
    Components
    Ex. Composition A D2 B D5 D8 H1 C1
    comp ex 13 13 10 — — — — — 90
    14 14 10 —  5 — 5 — 80
    comp ex 3 3 — — — — — 10 90
    comp ex 4 4 — — 10 — — — 90
    comp ex 5 5 — 10 — — — — 90
    comp ex 6 6 — — — 10 — — 90
    • Comp Ex 40, 43, 44, 45, 46, 47, 53, 54, and 56 and Ex 55, 57 and 58
  • The compositions obtained in comparative examples 3-6 and 13, and 16 and example 14 were mixed with further components and processed in an injection-moulding machine to give injection mouldings. Table F gives the parts of components.
  • TABLE F
    Components used
    Compositon
    Ex. Composition 13 14 3 4 5 6 C2 C4
    comp ex 40 40 — — — — — — 100 —
    comp ex 43 43 — — 1.5 — — — 98.5 —
    comp ex 53 53 1.5 — — — — — 98.5 —
    comp ex 44 44 0.5 — 1 — — — 98.5 —
    comp ex 45 45 1 — 0.5 — — — 98.5 —
    comp ex 46 46 — — — — — 1.5  98.5 —
    comp ex 54 54 0.375 — 0.375 — — 0.75 98.5 —
    comp ex 47 47 — — — 1.5 1.5  — 97 —
    55 55 1.5 — — 0.75 0.75 — 97 —
    comp ex 56 56 3 — — — — — 97 —
    comp ex 65 65 — — — 3 — — 97 —
    66 66 1.5 — — 1.5 — — 97 —
    comp ex 62 62 3 — — — — — — 97
    comp ex 67 67 — — — 3 — — — 97
    68 68 1.5 — — 1.5 — — — 97
    57 57 — 6 — — — — 94 —
    58 58 5 — — 10 — — 85 —
  • Light stability is shown in Table 5
  • TABLE 5
    light-stability (I)
    color before approx. approx.
    Ex exposure after 165 h after 300 h
    comp ex 40 not yellow severely yellowed severely yellowed
    comp ex 43 not yellow severely yellowed severely yellowed
    comp ex 53 not yellow yellowed yellowed
    comp ex 44 not yellow severely yellowed severely yellowed
    comp ex 45 not yellow severely yellowed severely yellowed
    comp ex 46 not yellow severely yellowed severely yellowed
    comp ex 54 not yellow severely yellowed severely yellowed
    comp ex 47 not yellow severely yellowed severely yellowed
    55 not yellow no yellowing no yellowing
    comp ex 56 not yellow slightly yellowed slightly yellowed
    comp ex 65 not yellow severely yellowed severely yellowed
    66 not yellow no yellowing no yellowing
    comp ex 62 not yellow slightly yellowed slightly yellowed
    comp ex 67 not yellow slightly yellowed Slightly yellowed
    68 not yellow no yellowing no yellowing
    57 not yellow no yellowing no yellowing
    58 slightly yellowed slightly yellowed slightly yellowed
  • The exposure to Xenon light shows similar tendency after one week (approx 165 h) as after two weeks (approx. 300 h).
  • A severe yellowing could be seen as expected with comp ex 40, the pure PC/ABS-polymer. If the polymer was stabilized with the HALS-stabilizer compound of formula (XII) or a combination of HALS compound of formula (XII) and compound of formula (I), severe yellowing occurred as well. Compound of formula (XII) or a combination of compound of formula (XII) and compound of formula (I) is not suitable to hinder PC/ABS from yellowing, as comp ex 43, 44 and 45 showed. Stabilization with compound of formula (I) alone gave better results (comp ex 53) concerning yellowing. No synergistic effects of a combination of compound of formula (XII) and compound of formula (I) was observed.
  • A severe yellowing could also be observed with the polymer stabilized with UV-absorber compound of formula (V) or stabilized with a combination of UV-absorber compound of formula (V) and HALS compound of formula (I) and HALS compound of formula (XII), as comp examples 54 and 46 showed, therefore, also the UV-absorber compound of formula (V) could not counteract the negative influence of the HALS compound of formula (XII).
    • Comparative Examples 47 and 56 and Example 55
  • Table 5 cites the values measured.
  • A severe yellowing could be observed with PC/ABS stabilized with a combination of the two UV-absorbers compounds of formula (II) and (III) (comp ex 47), whereas the stabilization with the HALS compound of formula (I) still gave slightly yellowing (comp ex 56). Combination of compounds of formula (I), (II) and (III) gave excellent colour stability, no yellowing of the polymer could be observed, as example 55 showed. Furthermore, as the combination of compound of formula (I), (II) and (III) gave much better results as the stabilization with only the compound of formula (I) or only the compounds of formula (II) and (III), a synergistic effect was observed.
    • Comparative Examples 56, 62, 65 and 67 and Examples 66 and 68
  • Table 5 cites the values measured.
  • A yellowing (slightly to severely) could be observed with PC/ABS or PC stabilized with only the UV-absorber compound of formula (III) (comp ex 65 and 67), whereas the stabilization with the HALS compound of formula (I) still gave slightly yellowing (comp ex 56 and 62). Combination of compounds of formula (I) and (III) gave excellent colour stability, no yellowing of the polymer could be observed, as ex 66 and 68 showed. Furthermore, as the combination of compound of formula (I) and (III) gave much better results as the stabilization with only the compound of formula (I) or only the compound of formula (III), a synergistic effect was observed.
  • No negative influence of the mechanical properties of the polycarbonate could be observed, when HALS (I) was used, as shown in table 6 and 7.
  • TABLE 6
    Mechanical properties before exposure to Xenon-lamp
    Tensile Tensile strength Tensile
    strength at break strain
    Ex [N/mm2] [N/mm2] [%]
    comp ex 30 63.0 7.07 56.8
    comp ex 62 63.0 6.90 57.6
    comp ex 67 63.9 7.34 57.1
    68 63.8 7.02 56.6
  • TABLE 7
    Mechanical properties after 300 h exposure to Xenon-lamp
    Tensile Tensile strength
    strength at break Tensile strain
    Ex [N/mm2] [N/mm2] [%]
    comp ex 30 62.8 6.58 56.1
    comp ex 62 64.0 6.61 57.9
    comp ex 67 63.9 6.81 57.0
    68 63.6 6.72 58.0
    • Examples 57 and 58
  • Table 5 cites the values measured.
  • No yellowing of PC/ABS could be observed when stabilized with a combination of HALS compound of formula (I) and UV-absorbers compounds of formula (III) and (VIII) (example 57). Example 58 showed slight yellowing already before exposure, when using the combination of compounds of formula (I) and (III), due to the relatively high concentration of stabilizers and therefore the own, slightly yellow color of the stabilizers begins to show. The yellow color before exposure did not change during exposure, i.e. did not become more intense.

Claims (12)

1. A polymer stabilizer for of polycarbonates (PC) or blends composed of polycarbonate and of one or more polymers other than polycarbonate comprising a compound of the formula (I)
Figure US20100179257A1-20100715-C00009
and of a compound of formula (III)
Figure US20100179257A1-20100715-C00010
and optionally of a component D, the component D being a UV stabilizer.
2. The polymer stabilizer according to claim 1, where the polymer other than polycarbonate in the polycarbonate blend is selected from the group consisting of styrene copolymers, polyesters, rubbers, polyvinyl polymers and vinyl chloride copolymers.
3. A composition Z comprising a component A, a component B and a component C and optionally a component D, where
component A is a compound of the formula (I) as defined in claim 1;
component C is one or more polymers selected from the group consisting
of polycarbonates, and
of blends composed of polycarbonate and of one or more polymers other than polycarbonate;
and of polymers compatible with polycarbonates, these polymers compatible with polycarbonates being selected from the group consisting of acrylonitrile-butadiene-styrene, styrene-acrylonitrile and polystyrene;
component B being a compound of formula (III) as defined in claim 1;
and component D being as defined in claim 1.
4. Composition Z according to claim 3, where component D is a compound selected from the group consisting of compounds of the formulae (II), (IV), (V), (VI), (VII), (VIII), (IX), (X) and (XI).
Figure US20100179257A1-20100715-C00011
Figure US20100179257A1-20100715-C00012
5. Composition Z according to claim 3, wherein the composition Z is free from effective amounts of further hindered amine light stabilizer HALS with a chemical structure other than the structure of the compound of the formula (I).
6. Composition Z according to one or more of claims 3, comprising
from 0.01 to 30% by weight of component A,
from 20 to 99.98% by weight of component C,
from 0.01 to 30% by weight of component B, and
from 0 to 79.98% by weight of further substances;
the % by weight values being based in each case on the total weight of the composition Z; where the % by weight values for components A, B and C and for the further substances always give a total of 100% by weight.
7. Composition Z according to claim 3, where the ratio by weight of component A to component B in the composition Z is from 1:10 to 10:1.
8. A process for the preparation of a composition Z according to claim 3, comprising the step of physically mixing components A, B and C and optionally further substances.
9. Process according to claim 8, where the mixing is done via extrusion or kneading or injection moulding or compression moulding.
10. Process according to claim 8, where the mixing temperature is from 100° C. to 380° C.
11. Process according to claim 8, wherein the mixing time is from 10 sec to 1 h.
12. A method of using composition Z according to claim 3, for the preparation of, or as, stabilized PC polymer or stabilized PC blend.
US12/601,727 2007-05-25 2008-05-21 Stabilization of polycarbonates Active 2029-03-17 US8748518B2 (en)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
EP07108964 2007-05-25
EP07108964.3 2007-05-25
EP07108964 2007-05-25
EP07122394 2007-12-05
EP07122395 2007-12-05
EP07122394.5 2007-12-05
EP07122395 2007-12-05
EP07122395.2 2007-12-05
EP07122394 2007-12-05
PCT/EP2008/056218 WO2008145574A1 (en) 2007-05-25 2008-05-21 Stabilization of polycarbonates

Publications (2)

Publication Number Publication Date
US20100179257A1 true US20100179257A1 (en) 2010-07-15
US8748518B2 US8748518B2 (en) 2014-06-10

Family

ID=39713961

Family Applications (2)

Application Number Title Priority Date Filing Date
US12/601,693 Abandoned US20100163814A1 (en) 2007-05-25 2008-05-21 Stabilization of Polycarbonates and polycarbonate Blends
US12/601,727 Active 2029-03-17 US8748518B2 (en) 2007-05-25 2008-05-21 Stabilization of polycarbonates

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US12/601,693 Abandoned US20100163814A1 (en) 2007-05-25 2008-05-21 Stabilization of Polycarbonates and polycarbonate Blends

Country Status (10)

Country Link
US (2) US20100163814A1 (en)
EP (2) EP2152798B1 (en)
JP (2) JP5264894B2 (en)
KR (2) KR101438250B1 (en)
CN (2) CN101688023A (en)
ES (2) ES2593089T3 (en)
HU (2) HUE031014T2 (en)
PL (2) PL2152797T3 (en)
TW (2) TWI432498B (en)
WO (2) WO2008145573A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100163814A1 (en) * 2007-05-25 2010-07-01 Clariant Finance (Bvi) Limited Stabilization of Polycarbonates and polycarbonate Blends
US20160122536A1 (en) * 2014-10-31 2016-05-05 Hyundai Motor Company Chemical resistant polymer resin composition for vehicle overhead console
US10087324B2 (en) 2013-06-11 2018-10-02 Sk Chemicals Co., Ltd. Parts for automobiles, electrical/electronic devices, home appliances, office equipment, or daily necessities

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6015022B2 (en) * 2011-02-16 2016-10-26 三菱化学株式会社 Polycarbonate resin composition and molded product
US9462319B2 (en) * 2014-08-08 2016-10-04 GM Global Technology Operations LLC Method and apparatus for sensor synthesis and arbitration between mobile devices and vehicles
JP6298935B2 (en) * 2015-12-08 2018-03-20 日本エイアンドエル株式会社 Thermoplastic resin composition
KR102166306B1 (en) * 2018-08-20 2020-10-15 주식회사 엘지화학 Polycarbonate resin composition and optical product including thereof
CN110256829B (en) * 2019-05-27 2021-02-19 中广核俊尔(浙江)新材料有限公司 High-fluidity polycarbonate composition, and preparation method and application thereof
CN115190895A (en) 2020-02-28 2022-10-14 高新特殊工程塑料全球技术有限公司 High heat polycarbonate copolymer formulations
TW202219082A (en) * 2020-08-28 2022-05-16 日商電化股份有限公司 Resin composition, molded article and cosmetics container

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5874493A (en) * 1996-04-12 1999-02-23 Clariant Finance (Bvi) Limited Stabilization of polyolefins
US5955521A (en) * 1997-07-17 1999-09-21 Mannington Mills, Inc. Ultra-violet stabilized polyvinyl chloride resins and methods to impart ultra-violet stabilization to polyvinyl chloride resins
US6297377B1 (en) * 1998-06-22 2001-10-02 Cytec Technology Corporation Benzocycle-substituted triazine and pyrimidine ultraviolet light absorbers
US20090054586A1 (en) * 2007-08-22 2009-02-26 General Electric Company Polycarbonate compositions
US20090191373A1 (en) * 2005-12-02 2009-07-30 Mitsui Chemicals ,Inc. Single Layer Film and Hydrophilic Material Comprising the Same
US20100163814A1 (en) * 2007-05-25 2010-07-01 Clariant Finance (Bvi) Limited Stabilization of Polycarbonates and polycarbonate Blends
US7935750B2 (en) * 2004-10-22 2011-05-03 Idemitsu Kosan Co., Ltd. Polycarbonate light diffusing resin composition

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9100257D0 (en) * 1991-01-07 1991-02-20 Sandoz Ltd Improvements in or relating to organic compounds
JPH04159354A (en) * 1990-10-20 1992-06-02 Kanegafuchi Chem Ind Co Ltd Thermoplastic resin composition excellent in weatherability
FR2694761B1 (en) * 1992-08-17 1996-06-14 Sandoz Sa STERICALLY HINDERED AMINES, THEIR PREPARATION AND THEIR USE AS STABILIZERS OF POLYMERIC MATERIALS.
GB9607565D0 (en) 1996-04-12 1996-06-12 Clariant Int Ltd Stabilizer composition
KR100496096B1 (en) * 1996-04-12 2005-09-27 클라리언트 파이넌스 (비브이아이) 리미티드 Stabilizer composition
US5990208A (en) * 1997-12-15 1999-11-23 Ciba Specialty Chemicals Corporation Stabilization of polycarbonate/ABS blends with mixtures of hindered amines and UV absorbers
GB2332678B (en) * 1997-12-23 2000-09-27 Ciba Sc Holding Ag Stabilizer mixtures containing a sterically hindered amine
US6262153B1 (en) 1998-10-12 2001-07-17 Clariant Finance (Bvi) Limited Colored wax articles
JP2002284957A (en) * 2001-03-23 2002-10-03 Denki Kagaku Kogyo Kk Rubber-modified styrene-based resin composition and sheetlike product thereof
US7081213B2 (en) * 2002-05-14 2006-07-25 Clariant Finance (Bvi) Limited Stabilizer mixtures for the protection of polymer substrates
WO2004065487A1 (en) * 2003-01-13 2004-08-05 Eastman Chemical Company Polymer blends
AU2005288942A1 (en) 2004-09-30 2006-04-06 Ciba Specialty Chemicals Holding Inc. Method for replenishing or introducing light stabilizers

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5874493A (en) * 1996-04-12 1999-02-23 Clariant Finance (Bvi) Limited Stabilization of polyolefins
US5955521A (en) * 1997-07-17 1999-09-21 Mannington Mills, Inc. Ultra-violet stabilized polyvinyl chloride resins and methods to impart ultra-violet stabilization to polyvinyl chloride resins
US6297377B1 (en) * 1998-06-22 2001-10-02 Cytec Technology Corporation Benzocycle-substituted triazine and pyrimidine ultraviolet light absorbers
US7935750B2 (en) * 2004-10-22 2011-05-03 Idemitsu Kosan Co., Ltd. Polycarbonate light diffusing resin composition
US20090191373A1 (en) * 2005-12-02 2009-07-30 Mitsui Chemicals ,Inc. Single Layer Film and Hydrophilic Material Comprising the Same
US20100163814A1 (en) * 2007-05-25 2010-07-01 Clariant Finance (Bvi) Limited Stabilization of Polycarbonates and polycarbonate Blends
US20090054586A1 (en) * 2007-08-22 2009-02-26 General Electric Company Polycarbonate compositions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100163814A1 (en) * 2007-05-25 2010-07-01 Clariant Finance (Bvi) Limited Stabilization of Polycarbonates and polycarbonate Blends
US10087324B2 (en) 2013-06-11 2018-10-02 Sk Chemicals Co., Ltd. Parts for automobiles, electrical/electronic devices, home appliances, office equipment, or daily necessities
US20160122536A1 (en) * 2014-10-31 2016-05-05 Hyundai Motor Company Chemical resistant polymer resin composition for vehicle overhead console

Also Published As

Publication number Publication date
US20100163814A1 (en) 2010-07-01
CN101688022A (en) 2010-03-31
KR20100017306A (en) 2010-02-16
JP2010528144A (en) 2010-08-19
HUE029678T2 (en) 2017-03-28
EP2152798B1 (en) 2016-08-17
EP2152798A1 (en) 2010-02-17
KR101438250B1 (en) 2014-09-05
JP2010528143A (en) 2010-08-19
KR101524321B1 (en) 2015-05-29
EP2152797A1 (en) 2010-02-17
KR20100035632A (en) 2010-04-05
TWI432498B (en) 2014-04-01
EP2152797B1 (en) 2016-07-13
TW200904873A (en) 2009-02-01
CN101688022B (en) 2012-07-25
TW200906939A (en) 2009-02-16
PL2152798T3 (en) 2017-05-31
CN101688023A (en) 2010-03-31
PL2152797T3 (en) 2017-03-31
JP5264894B2 (en) 2013-08-14
US8748518B2 (en) 2014-06-10
JP5048125B2 (en) 2012-10-17
WO2008145573A1 (en) 2008-12-04
WO2008145574A1 (en) 2008-12-04
HUE031014T2 (en) 2017-06-28
TWI432497B (en) 2014-04-01
ES2593089T3 (en) 2016-12-05
ES2599363T3 (en) 2017-02-01

Similar Documents

Publication Publication Date Title
US8748518B2 (en) Stabilization of polycarbonates
EP0705875B1 (en) Universal masterbatch
EP2272918B1 (en) Woody synthetic resin composition having improved weather resistance and molded body thereof
US20130085213A1 (en) Resin composition
US20200165448A1 (en) Composition, and flame-retardant resin composition
EP3683288B1 (en) Composition and flame retardant resin composition
EP2657288B1 (en) Flame-retardant styrene resin composition, and toner cartridge container produced using same
EP0226453B1 (en) Polyolefin composition
JP2023025384A (en) Resin composition and molding
TW202309254A (en) Flame retardant agent composition, flame retardant resin composition, and molded article thereof

Legal Events

Date Code Title Description
AS Assignment

Owner name: CLARIANT FINANCE (BVI) LIMITED, VIRGIN ISLANDS, BR

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RAASCH-MALBERG, KAREN;ENGE, THOMAS;SIGNING DATES FROM 20091022 TO 20091102;REEL/FRAME:023566/0270

Owner name: CLARIANT MASTERBATCHES (DEUTSCHLAND) GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RAASCH-MALBERG, KAREN;ENGE, THOMAS;SIGNING DATES FROM 20091022 TO 20091102;REEL/FRAME:023566/0270

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: CLARIANT INTERNATIONAL LTD., SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CLARIANT FINANCE (BVI) LIMITED;REEL/FRAME:037211/0894

Effective date: 20150828

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551)

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8

AS Assignment

Owner name: AVIENT SWITZERLAND GMBH, SWITZERLAND

Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNORS:CLARIANT FINANCE (BVI) LIMITED;CLARIANT MASTERBATCHES (DEUTSCHLAND) GMBH;SIGNING DATES FROM 20240112 TO 20240115;REEL/FRAME:066537/0280